SlickText MCP server

Read SlickText contacts, lists, campaigns, analytics and inbox; create and update contacts. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect SlickText50 free tool calls a month

What can I ask?

Turn on the SlickText connector, then ask in plain words. The AI picks the tools.

What you can do with SlickText in Claude and ChatGPT

For marketers and shop owners who text their customers with SlickText.

Check message credits and brand analytics

The AI reads the message credits for the billing period (used and available) and brand analytics such as contact growth and messages sent.

See how a text campaign performed

The AI lists campaigns and reads one campaign's contacts reached, clicks, unsubscribes, orders and revenue.

Count contacts in your lists and segments

The AI lists contact lists with their contact count over all statuses, and the contacts that match a segment.

Review inbox conversations and messages

The AI lists two-way inbox conversations by status with contact, assigned user and tags, and reads the messages sent and received.

Check your text-to-join keywords

The AI lists keywords with their auto-response and opt-in messages, and the lists that people who text a keyword are added to.

Find a contact, or add or update one

The AI finds a contact by phone or email first, then creates one, updates fields or adds the contact to lists. Subscribe only people who agreed to texts.

Changes data

How do I connect SlickText?

Before you connect

The login page asks for your SlickText API key.

In SlickText click the … beside your name → Settings → API & Webhooks → API Keys → Create API Key (the key is shown once). This is the SlickText API for accounts created on or after January 22, 2025; older (legacy) accounts are not supported. Your key is used only to call the SlickText API on your behalf; it is never shown to anyone.

Claude claude.ai · Desktop

  1. Open Customize → Connectors, then click + Add → Add custom connector.
  2. Enter the name SlickText and this URL, then click Add:
    https://slicktext.usefulapi.io/mcp
  3. Claude opens the login page: enter your SlickText API key.
  4. In a chat, click + → Connectors and turn on SlickText.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

  1. Open Plugins, click +, then Add custom MCP server.
  2. Enter the name SlickText and this URL, choose OAuth as the authentication, confirm the warning and create it:
    https://slicktext.usefulapi.io/mcp
  3. ChatGPT opens the login page: enter your SlickText API key.
  4. In Plugins, install SlickText, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http slicktext https://slicktext.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "slicktext": {
      "url": "https://slicktext.usefulapi.io/mcp"
    }
  }
}

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "slicktext": {
      "type": "http",
      "url": "https://slicktext.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add slicktext --url https://slicktext.usefulapi.io/mcp
codex mcp login slicktext

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://slicktext.usefulapi.io/mcp

Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your SlickText API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Proper account$9/mo · $90/yr10,000 tool calls / month
Pro+per account$39/mo · $390/yr100,000 tool calls / month

Each paid plan covers this SlickText server only. Ask your AI to run slicktext_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with slicktext_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with slicktext_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 28

Show all 28 tools (the AI picks them for you)

Read only · 21

  • Get the brandslicktext_get_brand
    Get the SlickText brand this API key belongs to: brand_id, name, website, sending-number registration details, opt-in / double-opt-in messages, inbox settings and the message credit limit. Every other tool works within this brand.
  • Get message credit usageslicktext_get_credit_usage
    Message credits for the current billing period: total_credits (subscription + rollover + purchased), credits_used, credits_available and the credit limit.
  • List contactsslicktext_list_contacts
    List the brand's contacts (subscribers) with name, mobile_number, email, opt_in_status, source, custom_fields and dates. Filters are exact, case-sensitive matches (SlickText has no partial search). Paged: returns count, has_more and next_offset.
  • Find a contact by phone or emailslicktext_find_contact
    Find contacts by mobile number or email address (exact match). A 10-digit US number is matched as +1XXXXXXXXXX, the way SlickText stores numbers. Use it before creating a contact to avoid duplicates. GET /brands/{brand_id}/contacts?mobile_number=… or ?email=….
  • Get a contactslicktext_get_contact
    Get one contact by id: name, mobile_number, email, birthdate, address, opt_in_status, source, custom_fields, time zone and dates.
  • List custom fieldsslicktext_list_custom_fields
    List the brand's contact custom fields: name, internal_name (the key used in contact filters and writes), data_type and description.
  • List contact listsslicktext_list_lists
    List the brand's contact lists (contact_list_id, name, description, created). Optional exact name filter.
  • Get a contact listslicktext_get_list
    Get one contact list by id plus its contact count (all statuses: subscribed, not subscribed, unsubscribed, blocked).
  • List contacts in a listslicktext_list_list_contacts
    List the contacts in one contact list (paged).
  • List segmentsslicktext_list_segments
    List the brand's segments (rule-based contact groups: segment_id, name, description).
  • List contacts in a segmentslicktext_list_segment_contacts
    List the contacts that currently match one segment (paged).
  • List campaignsslicktext_list_campaigns
    List the brand's SMS/MMS campaigns: name, body, status (e.g. draft, scheduled, queued, sent), scheduled/started/finished times, completion_percentage and audience (lists/segments and size).
  • Get a campaignslicktext_get_campaign
    Get one campaign by id: body, media_url, status, audience_size, schedule and completion.
  • Get campaign performanceslicktext_get_campaign_stats
    Performance of one campaign: contacts reached, clicks, click_rate, unique clicks, unsubscribes, unsubscribe_rate, orders, revenue, average order value, revenue per message, plus the campaign, its audiences and links.
  • Get brand analyticsslicktext_get_analytics
    Brand-level analytics. metric: contacts (current totals), contact_growth, contact_add_delete_events, opt_in_status_events, campaigns, messages (messages sent), message_credits, inbox_users (assignments, closures, response times per user), inbox_tags. Optional group (allowed per metric — contacts: source|opt_in_status; contact_growth/campaigns: contact_source; contact_add_delete_events: contact_source|type; opt_in_status_events: contact_source|contact_unsubscribe_source|opt_in_status; messages: source|status|direction|weekday; message_credits: source|status), a start/end range, frequency (hour/day/month/year) and compare (YoY, QoQ, MoM, WoW, DoD, PoP).
  • List keywordsslicktext_list_keywords
    List the brand's text-to-join keywords (word, description, active, auto-response and opt-in messages, double opt-in).
  • Get a keywordslicktext_get_keyword
    Get one keyword by id, including the contact_list_ids that people who text it are added to.
  • List messagesslicktext_list_messages
    List individual SMS/MMS messages sent and received by the brand: to, from, body, direction, source (Campaign, Keyword, InboxThread, API …), status (delivered, undelivered …), credits and the contact. Filters are exact matches; use to/from with a phone number to read one contact's history, or source=InboxThread with source_id = a conversation id.
  • List inbox conversationsslicktext_list_conversations
    List two-way inbox conversations: status (open, pending, closed), the contact, the last message and its direction/time, assigned user, tags and unread state.
  • Get an inbox conversationslicktext_get_conversation
    Get the content of one inbox conversation by its id (the _id from slicktext_list_conversations). For the message-by-message history also call slicktext_list_messages with source=InboxThread and source_id=<conversation id>.
  • List inbox tagsslicktext_list_inbox_tags
    List the inbox tags used to label conversations (inbox_tag_id, name, color, description).

Changes data · 3

  • Create a contactslicktext_create_contact
    WRITE: add a contact to the brand. By default the contact is created as 'not subscribed' and gets no text. Set opt_in_status='subscribed' ONLY for people who gave explicit permission to receive texts (SlickText has a zero-tolerance policy for unsolicited texts). force_double_opt_in=true makes SlickText SEND A REAL SMS to the number asking the person to confirm. Check slicktext_find_contact first to avoid duplicates. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows.
  • Update a contactslicktext_update_contact
    WRITE: change fields of an existing contact (only the fields you pass are sent). opt_in_status can mark a contact unsubscribed or blocked; set it to 'subscribed' ONLY when the person explicitly agreed to receive texts. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows.
  • Add a contact to listsslicktext_add_contact_to_lists
    WRITE: add one contact to one or more contact lists (it does not change the contact's opt-in status; lists are also campaign audiences). Returns SlickText's count of memberships added. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows.

Your usefulapi plan · 4

  • Usage status (free-tier meter)slicktext_usage_status
    Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
  • Request a missing featureslicktext_request_feature
    Tell usefulapi that the user needs something the SlickText tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
  • Upgrade to Pro or Pro+slicktext_upgrade
    Get a paid plan for SlickText (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
  • Cancel the Pro subscriptionslicktext_cancel_subscription
    Cancel the caller's SlickText Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run slicktext_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with SlickText in Claude or ChatGPT?

Check message credits and brand analytics. See how a text campaign performed. Count contacts in your lists and segments. Review inbox conversations and messages. Check your text-to-join keywords. Find a contact, or add or update one. See what you can do for the details.

Is this an official SlickText product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by SlickText. The server calls the SlickText API with your own SlickText access, so it sees only the data that your account can see.

Can I connect SlickText to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your SlickText API key. See Before you connect for where to find it.

Do I put my SlickText key or an Authorization header in the client config?

No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your SlickText API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my SlickText credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the SlickText API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in SlickText.

Can the AI change my SlickText data?

Yes, if you approve it. 3 of the 24 SlickText tools can create or change data. The other 21 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this SlickText server only. Cancel any time: your paid plan then runs to the end of the paid period. Run slicktext_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run slicktext_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run slicktext_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a SlickText tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with slicktext_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

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